State Industries GFK-0827 manual Genius Bus, GeniusBlocks

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4

Genius Bus

Genius bus faults are not fatal to the PLC. However, if a bus fault exists, it exists for both systems. There may be situations where one controller can communicate to more blocks than the other controller can. Since both controllers are running with the same outputs and shared inputs, and both controllers are still synchronized, the blocks will choose which controller to respond to, if either can be heard.

The Genius bus can be repaired without disturbing power to either system and thus without disturbing which PLC is in control of the process. Replacement of a bus can be done on line but is not recommended because all devices on that bus will be lost until the bus is repaired.

GeniusBlocks

The failure of a single block is not fatal to the PLC.

GFK-0827

Chapter 4 Operation

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Contents GE Fanuc Automation GFL±002 Content of this Manual Related PublicationsPreface We Welcome Your Comments and SuggestionsContents Chapter System Components Chapter Configuration Chapter Operation System Operation Fault Detection and Control Actions Synchronized Hot Standby CPU Redundancy System Configuration Contents Chapter Introduction Hot Standby CPU Redundancy ProductGFK-0827 Features of the Hot Standby CPU Redundancy Product Benefits of the Hot Standby CPU Redundancy ProductLocal I/O System Systems for Hot Standby CPU Redundancy SystemsGenius I/O System Cable ConnectionsBasic Hot Standby Operation Control StrategySynchronized Hot Standby CPU Redundancy System Configuration Redundancy CPU Module Redundancy Communications ModuleSynchronized CPUs Bumpless SwitchingSwitch to Backup Unit Time Effect on Scan TimeOn-Line Programming Configurable Backup Data SizeOn-Line Repair Configuration Requirements Programming ConsiderationsDefinition of Terms Term DefinitionCommonly Used Acronyms Acronym DefinitionChapter System Components Redundancy CPUCPU Architecture Watchdog TimerCapacities for Redundancy CPU, IC697CPU780 CPU Features Redundancy CPU IC697CPUCPU Mode Switch Valid Operating Mode SelectionBattery Connectors Memor y Protect KeyswitchCPU Status LEDs Expansion Memory Board Serial Port ConnectorExpansion Memory Boards for CPU RCM Features Redundancy Communications ModuleRCM System Status Leds Board OKRCM Connectors Unit Selection PushbuttonLED Status Indicators Bus Transmitter ModuleBTM Connectors Bus Receiver ModuleBRM Connectors Bus Signal TerminationGenius Bus Controller Genius Bus Controller User Features GBC Connectors RacksChapter Configuration Configuring a Hot Standby CPU Redundancy SystemSystem Configuration Basic Redundancy System SetupLogicmaster 90 Configuration Redundancy System RequirementsScreens for Fault Category Configuration Monitor or Online modeConfiguration with Logicmaster Handling FoldersConfiguration of a Redundancy CPU Module GFK-0827 Redundant CPU Requirements Redund Type Normal Sweep ModeBackground Window Constant Window Sweep Mode Constant Sweep ModeFail Wait Ctrl StrgyShared I/O Shared I/O Data Parameters Shared I/O Reference ValuesTransfer Data Size Reference Type ReferenceSize CalculationforNumberofBytesConfiguring a CPU Expansion Memory Board Configuration of a Redundancy Communications Module Configuration Configuration of a Genius Bus Controller Paired GBC ParameterSerial Bus Address Configuring a Primary Redundant PLC Select the Redundancy CPU Module Select an Expansion Memory Board Configure the Redundant Communications Module Configure a Genius Bus Controller Configuration Configure Genius I/O Blocks Configure the Bus Transmitter Module Configuring a Secondary Redundant PLC Change Redund Type GFK-0827 Power-Up Sequence of a Redundant CPU Chapter OperationIncompatible Configurations Resynchronization of the Redundant CPU Hot-Standby Redundancy Control Strategy Synchronous Scan First Data Transfer %I, %AI and SynchronizationData Transfer from Backup Unit to Active Unit Switching Control to Backup Unit Second Data Transfer %Q, %AQ, %R, and %MRole Switch Svcreq References for CPU Redundancy Definition for% S Reference for Redundancy StatusRedundancy CPU Considerations RUN Disabled Mode Differences in Operation for CPURUN/ENABLED Locrdy Locact Remrdy Remact Configuration of Fault Actions Stop to RUN Mode Transition Background Window TimeWords per Sweep = Timed Contacts Ovrpre %S ReferenceGenius Bus Controller Switching Fault Detection Fault CategoriesChanging Fault Category Actions PLC Fault Table Fault Zoom Help Text for Redundancy Error CodesFaulting RCMs, Losing Links, and Terminating Communications GFK-0827 Fault Actions in a CPU Redundancy System Maskable Fault Group DescriptionsMaskable Fault Group Actions UserConfigurableNon-Maskable Fault Group Descriptions Non-Maskable Fault Action DescriptionsMaintaining Parallel Bus Termination On-Line RepairOn-Line Repair Recommendations Central Processor Unit Power SupplyRacks Redundancy Communications Module and CablesBus Transmitter Module Redundancy Communications Link FailuresGenius Bus Controller Genius Bus GeniusBlocksAppendix Redundancy Alternatives Redundancy AlternativesRedundancy Option Key See Table RedundancyOptions PLCSeries 90-70 Redundancy Through Application Logic Index Index Index Index Index